strontium, Sr, atomic number 38 -- (a soft silver-white or yellowish metallic element of the alkali metal group; turns yellow in air; occurs in celestite and strontianite)
steradian, sr -- (the unit of solid angle adopted under the Systeme International d'Unites)
dictionary, definition of, free online dictionary, online dictionary, English dictionary, dict, diction, dictonary, glossary, define, definitions, meaning, word of the day, spelling, pronunciation, dictio, dictiona, dic, dicti, dictionar